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Dear Yi,<br />
&nbsp;&nbsp;&nbsp;&nbsp;见信如故
&amp; 要用花号的话，在网页里面最好写成&amp;amp;
&lt;div&gt;&lt;/div&gt;是最常见的块元素

lt less than , gt = greater than 
        <div>其实也可以写</div>
        ehllo,<span style="color:red;">严一</span>
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        <br />
                ,我想新<br />起一<br />行。
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